[Y2AJ]

How much air needs to be filled into my 442ms? I haven't filled any air since I picked the car in March. right now it's 2.7 bar all around with only 1 wheel at 2.1 for some reason. How much should they all be at ideally?

[amsbmw]

Id like to know to (403M) 3 of mines are at 34psi, ones at 29psi and I got a tyre pressure warning on last night, will fill them up later.

Found a old thread that said
38 rear
36 front

Would that be ok?

[elstoof]

There's a sticker on your actual car that tells you this. Usually on the driver's door frame or the inside of the petrol flap.

[225]

Did mine today but with a loaded car so over 42 psi for rears which still Haven't got used to yet coming from non run flats as seems very high still. Quite the harsher ride...

[Rich9600]

As above. Check the door card, pressures vary according to spec.

I find run-flats need pressure to bulge the tread out and lift the weight of the car off the run flat edges. Hitting the pressure sweet spot gives the best ride by far.

[NISFAN]

BMW like to keep tyre pressures a closely guarded secret. I hear they put out a hit on anyone that finds out.